Digging Down To Stuck Seattle Tunnel Machine

A worker checks the head of the tunnel boring machine of the new high-speed TAV rail line in the Chiomonte tunnel on November 12,2013. The high-speed rail link between Turin-Lyon is considered a key element of a planned network of high-speed railways across Europe and is expected to cost an estimated 12.5 billion euros (15 billion US dollars) and be completed by 2020. AFP PHOTO / GIUSEPPE CACACE (Photo credit should read GIUSEPPE CACACE/AFP/Getty Images)